1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2009 Lemote Inc. 4 * Author: Wu Zhangjin, wuzhangjin@gmail.com 5 */ 6 7 #include <linux/irqchip.h> 8 #include <linux/logic_pio.h> 9 #include <linux/memblock.h> 10 #include <asm/bootinfo.h> 11 #include <asm/traps.h> 12 #include <asm/smp-ops.h> 13 #include <asm/cacheflush.h> 14 #include <asm/fw/fw.h> 15 16 #include <loongson.h> 17 #include <boot_param.h> 18 19 #define NODE_ID_OFFSET_ADDR ((void __iomem *)TO_UNCAC(0x1001041c)) 20 21 u32 node_id_offset; 22 23 static void __init mips_nmi_setup(void) 24 { 25 void *base; 26 extern char except_vec_nmi[]; 27 28 base = (void *)(CAC_BASE + 0x380); 29 memcpy(base, except_vec_nmi, 0x80); 30 flush_icache_range((unsigned long)base, (unsigned long)base + 0x80); 31 } 32 33 void ls7a_early_config(void) 34 { 35 node_id_offset = ((readl(NODE_ID_OFFSET_ADDR) >> 8) & 0x1f) + 36; 36 } 37 38 void rs780e_early_config(void) 39 { 40 node_id_offset = 37; 41 } 42 43 void __init prom_init(void) 44 { 45 fw_init_cmdline(); 46 prom_init_env(); 47 48 /* init base address of io space */ 49 set_io_port_base(PCI_IOBASE); 50 51 loongson_sysconf.early_config(); 52 53 prom_init_numa_memory(); 54 55 /* Hardcode to CPU UART 0 */ 56 setup_8250_early_printk_port(TO_UNCAC(LOONGSON_REG_BASE + 0x1e0), 0, 1024); 57 58 register_smp_ops(&loongson3_smp_ops); 59 board_nmi_handler_setup = mips_nmi_setup; 60 } 61 62 void __init prom_free_prom_memory(void) 63 { 64 } 65 66 static __init void reserve_pio_range(void) 67 { 68 struct logic_pio_hwaddr *range; 69 70 range = kzalloc(sizeof(*range), GFP_ATOMIC); 71 if (!range) 72 return; 73 74 range->fwnode = &of_root->fwnode; 75 range->size = MMIO_LOWER_RESERVED; 76 range->hw_start = LOONGSON_PCIIO_BASE; 77 range->flags = LOGIC_PIO_CPU_MMIO; 78 79 if (logic_pio_register_range(range)) { 80 pr_err("Failed to reserve PIO range for legacy ISA\n"); 81 goto free_range; 82 } 83 84 if (WARN(range->io_start != 0, 85 "Reserved PIO range does not start from 0\n")) 86 goto unregister; 87 88 /* 89 * i8259 would access I/O space, so mapping must be done here. 90 * Please remove it when all drivers can be managed by logic_pio. 91 */ 92 ioremap_page_range(PCI_IOBASE, PCI_IOBASE + MMIO_LOWER_RESERVED, 93 LOONGSON_PCIIO_BASE, 94 pgprot_device(PAGE_KERNEL)); 95 96 return; 97 unregister: 98 logic_pio_unregister_range(range); 99 free_range: 100 kfree(range); 101 } 102 103 void __init arch_init_irq(void) 104 { 105 reserve_pio_range(); 106 irqchip_init(); 107 } 108